#!/bin/sh
set -eu

CONF=/etc/nginx/conf.d/default.conf
A_UPSTREAM="${A_UPSTREAM:-http://project57-deploy.ns-project57.svc.cluster.local:3000}"
A_UPSTREAM="${A_UPSTREAM%/}"

NS="$(awk '/^nameserver/{print $2; exit}' /etc/resolv.conf || true)"
if [ -z "${NS}" ]; then
  NS=kube-dns.kube-system.svc.cluster.local
fi

sed -i \
  -e "s|__RESOLVER__|${NS}|g" \
  -e "s|__A_UPSTREAM__|${A_UPSTREAM}|g" \
  "${CONF}"

nginx -t